"If you can’t explain something in simple terms, you don’t understand it"
https://kottke.org/plus/misc/images/feynman-blackboard.jpg https://kottke.org/17/06/if-you-cant-explain-something-in-simple-terms-you-dont-understand-it
"What I cannot create, I do not understand."
http://archives-dc.library.caltech.edu/sites/default/files/new-banner.png http://archives-dc.library.caltech.edu/islandora/object/ct1%3A483